[Intel-gfx] [PATCH 1/4] drm/i915/bxt: Enable WaVSRefCountFullforceMissDisable

[Mika Kuoppala]

Hi,

Nick Hoath <nicholas.hoath at intel.com> writes:

> From: Rafael Barbalho <rafael.barbalho at intel.com>
>
> Signed-off-by: Rafael Barbalho <rafael.barbalho at intel.com>
> Signed-off-by: Nick Hoath <nicholas.hoath at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_pm.c | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 32ff034..d635d0a 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -59,6 +59,11 @@ static void gen9_init_clock_gating(struct drm_device *dev)
>  	/* WaEnableLbsSlaRetryTimerDecrement:skl */
>  	I915_WRITE(BDW_SCRATCH1, I915_READ(BDW_SCRATCH1) |
>  		   GEN9_LBS_SLA_RETRY_TIMER_DECREMENT_ENABLE);
> +
> +	/* WaVSRefCountFullforceMissDisable:skl,bxt */
> +	I915_WRITE(GEN7_FF_THREAD_MODE,
> +		   I915_READ(GEN7_FF_THREAD_MODE) &
> +		   ~(GEN7_FF_VS_REF_CNT_FFME));
>  }
>  

This bit 19 seems to be about Tesselation DOP gating disable
with gen9+ onwards. And with that workaroundname, the applicability
should be hsw,bdw. I am confused.

-Mika


>  static void skl_init_clock_gating(struct drm_device *dev)
> -- 
> 2.1.1
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx